Common fingerstylists employ innumerable looping pedals to erect intricate harmonies as producer/performers. Discipline recording documentarians overlay environmental textures matching distant lands evoked by influenced acoustic instruments. The theremin is often a beat-frequency audio oscillator (sine-wave generator) that has two condensers positioned not In the circuit chassis but, ... https://www.youtube.com/watch?v=QqJZL82Fv1I&t=122s